1. Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
2. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
3. Institute of Physics, University of Tartu, 50411 Tartu, Estonia
4. Vinogradov Institute of Geochemistry, Siberian Branch of the Russian Academy of Sciences, 664033 Irkutsk, Russia
5. Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia
6. Geological Institute, Kola Science Centre, Russian Academy of Sciences, 184209 Apatity, Russia